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PHP tutorial
  • DateTime error handling in php

    DateTime error handling in php

    When using the DateTime class in PHP, error handling often involves catching invalid date formats or incorrect date operations. DateTime related operations can catch errors through exception handling. Here are some common error handling methods:
    2024-11-07
  • What is php aggregate iterator

    What is php aggregate iterator

    2022-06-21
  • What is the difference between PHP framework and CMS

    What is the difference between PHP framework and CMS

    What is a PHP framework? What is the difference between PHP framework and CMS? Many netizens don’t know much about the difference between PHP framework and CMS. The following editor will introduce to you the differences between PHP framework and CMS. If y
    2022-06-14
  • The difference between PHP definition constant methods

    The difference between PHP definition constant methods

    The differences between PHP's methods of defining constants: 1. Const is a language structure, define() is a function, and const compilation is faster than define(). 2. define() declares a constant. The constant name is of string type, can be dynamica
    2022-06-08
  • What are the special types of php variables?

    What are the special types of php variables?

    Special types of PHP variables: 1. Resource is a special variable that is stored in external resources. 2. NULL, the special NULL means that a variable has no value, and the only possible value of the NULL type is NULL.
    2022-06-08
  • How to install grpc extension in php

    How to install grpc extension in php

    How to install grpc extension in php: 1. Add grpc extension configuration in php.ini file: extension=grpc.so. 2. Install protobuf and its php extension. 3. Restart php-fpm.
    2022-06-08
  • The role of php bridge mode

    The role of php bridge mode

    The role of the PHP bridge mode: 1. The bridge mode separates the abstract interface and its implementation part to achieve decoupling, which is a better solution than inheritance. 2. Easy to expand. The bridging mode is more flexible than inheritance. It
    2022-06-08
  • what is php bridge mode

    what is php bridge mode

    Introduction to PHP bridge mode: 1. Combine two originally unrelated classes, and then use the methods and attributes in the two classes to output a new result. 2. The structure is divided into abstract classes, refined abstract classes, implementation cl
    2022-06-07
  • Analysis of the working principle of php iterator

    Analysis of the working principle of php iterator

    Analysis of the working principle of PHP iterator: 1. Before the first iteration, run the iterator method. 2. Verify whether the first element is valid. 3. foreach continues to call Iterator. 4. The method body of foreach. 5. After each iteration, call th
    2022-06-07
  • The role of php iterator iterator

    The role of php iterator iterator

    The functions of PHP iterator: 1. When executing the foreach object, it is automatically called and specifies the traversal method. 2. Iterator is a predefined interface class in PHP and can be used directly. iterator{} is a subclass of Traversable{}.
    2022-06-07
  • The use of foreach in php

    The use of foreach in php

    The use of foreach in PHP: 1. Foreach is a tool through objects. It can be used alone or with iterators and generators. 2. If foreach is defined as a class, all attributes can be output. If it is called as a function outside the category, only public attr
    2022-06-07
  • Comparison of two definition methods in php constants

    Comparison of two definition methods in php constants

    Comparison of two definition methods in PHP constants: 1. const defines PI as a variable. Defined constants can only be placed in the top directory and cannot be placed in if statements or {} in functions. 2. define is a macro definition, and defined cons
    2022-06-06
  • How to understand php command mode

    How to understand php command mode

    Understanding of PHP command mode: 1. Encapsulate the request into an object, allowing different requests to be used to parameterize customers. Queue or log requests and support undoable actions. 2. It is composed of command abstract class, concrete comma
    2022-06-06
  • Comparison of PHP pass by value and pass by reference

    Comparison of PHP pass by value and pass by reference

    Comparison of PHP pass-by-value and pass-by-reference: 1. PHP must copy the value in pass-by-value. Especially for large strings and objects, this will be an expensive operation. 2. Passing by reference does not require copying the value, which is benefic
    2022-05-31
  • Usage of php empty() function

    Usage of php empty() function

    Usage of php empty() function: 1. Used to detect whether the variable is empty. 2. If the variable does not exist, or its value is equal to FALSE, it is considered not to exist. If there are no variables, empty() will not issue a warning.
    2022-05-30
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